Negative index fishnet with nanopillars formed by direct nano-imprint lithography

Article English OPEN
Sharp, Graham J ; Khan, Saima I ; Khokhar, Ali Z. ; De La Rue, Richard M. ; Johnson, Nigel P. (2014)

In this paper we demonstrate the ability to fabricate fishnets by nanoimprinting directly into a pre-deposited three layer metal–dielectric–metal stack, enabling us to pattern large areas in two minutes. We have designed and fabricated two different fishnet structures of varying dimensions using this method and measured their resonant wavelengths in the near-infrared at 1.45 μm and 1.88 μm. An important by-product of directly imprinting into the metal–dielectric stack, without separation from the substrate, is the formation of rectangular nanopillars that sit within the rectangular apertures between the fishnet slabs. Simulations complement our measurements and suggest a negative refractive index real part with a magnitude of 1.6. Further simulations suggest that if the fishnet were to be detached from the supporting substrate a refractive index real part of 5 and FOM of 2.74 could be obtained.
  • References (44)
    44 references, page 1 of 5

    [1] Zhang S, Fan W, Panoiu N C, Malloy K J, Osgood R M and Brueck S R J 2005 Opt. Express 13 4922-30

    [2] Zhang S, Fan W, Malloy K J, Brueck S R J, Panoiu N C and Osgood R M 2006 J. Opt. Soc. Am. B 23 434-8

    [3] Dolling G, Enkrich C, Wegener M, Soukoulis C M and Linden S 2006 Opt. Lett. 31 1800-2

    [4] Pendry J B 2000 Phys. Rev. Lett. 85 3966-9

    [5] Shalaev V M 2007 Nat. Photonics 1 41-8

    [6] Mary A, Rodrigo S G, Garcia-Vidal F J and Martin-Moreno L 2008 Phys. Rev. Lett. 101 103902

    [7] Kafesaki M, Tsiapa I, Katsarakis N, Koschny T, Soukoulis C M and Economou E N 2007 Phys. Rev. B 75 235114

    [8] Dolling G, Wegener M, Soukoulis C M and Linden S 2007 Opt. Express 15 11536-41

    [9] Valentine J, Zhang S, Zentgraf T, Ulin-Avila E, Genov D A, Bartal G and Zhang X 2008 Nature 455 376-9

    [10] Garcia-Meca C, Hurtado J, Marti J, Martinez A, Dickson W and Zayats A V 2011 Phys. Rev. Lett. 106 067402

  • Metrics
    No metrics available
Share - Bookmark